, Volume 40, Issue 1, pp 6-14,
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Optical strain detectors based on gold/elastomer nanoparticulated films

Abstract

The application of two different optical effects is demonstrated for the detection of strain applied to elastomeric films. On one hand, dense coatings made of silica-coated gold nanoparticles (Au@SiO2 NPs), which are built up onto poly(dimethylsiloxane) (PDMS) elastomeric films, using the layer-by-layer (LbL) method, provide intense surface plasmon resonance (SPR) absorption. On the other hand, polystyrene spheres can be deposited as ordered monolayers to create patterned PDMS films with well-defined light diffraction. Both effects were used to monitor the structural damage of such PDMS films upon stretching, remaining both physical phenomena (absorption from the gold film and diffraction from the ordered structure) active for optical sensing applications in the early detection of structural damage in critical infrastructures.

Miguel A. Correa-Duarte obtained a PhD degree in Chemistry from the University of Vigo in 2002 and since then had postdoctoral position in CAESAR (Bonn) and a visiting research assistant professor position in Arizona State University (USA). He currently holds an associate researcher position at the Department of Physical Chemistry at the University of Vigo. His research interest is in the field of Nanoscience and Nanotechnology, including carbon nanotube functionalization and carbon nanotubebased hybrid materials, core-shell nanoparticles and composites. He has previously worked in business for chemistry-related companies.